Edit Node

Function Description

The Edit Node button in the Object Editing group of the Edit Data tab provides functions for editing nodes of a geometry, including: adding, deleting, and moving nodes.

Nodes represent a series of coordinate points that describe geometries in SuperMap. Text objects in SuperMap do not have nodes. Node editing is only available for line and region objects.

Function Entry

Edit Data tab -> Object Editing group -> General editing -> Trimming -> Edit Node

Operation Steps

Edit Node operations

When the Edit Node button is selected, in an editable layer of the map, you can edit the nodes of the currently selected geometry, including adding, moving, and deleting nodes.

The specific steps are as follows:

Set the layer containing the geometry (line or region) whose nodes you want to edit in the map to an editable state.
Select a region or line object to edit (only one selected object can be edited at a time). In the Edit Data tab, under the General editing drop-down menu, click the Edit Node button to select it. Alternatively, double-click the geometry you want to edit.
At this point, the operation status of the current map changes to edit node mode, and all nodes of the selected geometry will be displayed.
Add Node: Click the left mouse button on the selected geometry to add a node.
Move Node: Select a node on the geometry, hold down the left mouse button, and drag the mouse to move the selected node. After moving, release the left mouse button. The shape of the geometry will change accordingly after moving the node.
Delete Node: Select a node on the geometry. You can hold down the Shift or Ctrl key to select multiple nodes continuously. Double-click the left mouse button or press the Delete key to delete the selected nodes. The shape of the geometry will change accordingly after deleting nodes.
Note:
When performing delete node operations on a complex object (composed of two or more sub-objects):
- If the sub-object is a region, after deleting a node, if the remaining nodes of the sub-object are less than 3 (cannot form a closed region), the system will automatically delete that sub-object.
- If the sub-object is a line, after deleting a node, if the remaining nodes of the sub-object are less than 2 (cannot form a line), the system will automatically delete that sub-object.
During the operation, users can directly select other geometries to add, move, or delete nodes. If you click on an empty area of the map, the object editing functions are disabled, and the mouse automatically switches to selection mode. When you reselect a geometry, the edit node function is activated by default. The edit node operation status will continue until you toggle the Edit Node button to the unpressed state.
To cancel the current edit node operation, simply click the Edit Node button again to deselect it, or right-click on the map.